In microwave-safe bowl, combine butter, onion, and garlic. Microwave on high power for 2 minutes until onion is tender. Mix stuffing, broth, apricots, and onion mixture in a 4-5 quart crockpot. If pork has excess fat, trim it off. Place pork on top of stuffing mixture.

In small bowl, combine jam and vinegar and pour this mixture over pork. Cover slow cooker and cook on low for 5-8 hours until pork is tender and reaches 150 degrees F on an internal meat thermometer. If you have a newer, hotter cooking crockpot, check at the shorter time. Remove pork from cooker, cover with foil and let rest 5 minutes before carving. Remove stuffing from crockpot, stir gently, and serve.